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Appeared on: Friday, April 16, 2004
Aopen DRW8800

1. Package - Installation

Aopen DRW8800/AAN - Page 1

Taiwanese manufacturer,
AOpen, has expanded its product line to include motherboards, graphics cards,
sound cards and other PC peripherals. With optical storage devices, Aopen
has released the
new DRW8800, commercially labeled as Aopen 8x8 DVD Dual.

- AOpen DRW4410 features

The
drive supports DVD+R/RW, DVD-R/RW, CD-RW, DVD, CD while offering good compatibility
with recording software. Aopen features the Just Link technology developed by
Ricoh to prevent buffer under-run errors. During the writing process, the drive
calculates the optimum laser power, adjusting it in real-time to compensate
for a dirty disc.

According to InfoTool, the drive uses 2MB buffer memory. On the
read features, the only unavailable read format is the DVD-RAM format while
with
the write
features it does not support DVD-RAM and Mount Rainier. PacketWriting
and all other writable/rewritable formats are supported. Under the modes tab,
RAW DAO 96 writing (CD) is also supported.

Aopen uses the RPC II region control, allowing a user to change
the drive's region at most 5 times(3 shown above). For our tests, we set the region
code to 2 (Europe).

- Retail package

The
retail package includes a quick installation quide, mounting screws, an analog
cable and the Aopen DRW8800/AAN. The software is provided on two CDs. The
first includes Nero Express 6 and PowerDVD 5.0 for writing and playback tasks.
The
second includes Sonic MyDVD and Arcsoft ShowBiz for video authoring.

- The drive

The drive's front panel is pretty much standard, with all logos on
the loading tray. The CD-RW logo ,
the +RW and -RW logos and the Aopen logo (colored black). Also on the front panel
are the eject button, the activity led indicator, the emergency hole while
there are no volume control and headphone jack.

On the rear panel there are
the analogue and digital audio outputs (SPDIF), the IDE connector
and the power input.

Removing the screws and opening the drive's cover voids the drive's warranty.
For reference reasons, we post the following pictures.

- Installation

The Aopen drive was connected to our test PC and was identified
as "AOPEN 8X8 DVD Dual AAN" under
WinXP. All tests were done with firmware v.1.4A

The following pages include test results for Aopen's drive in comparison
with two other dual DVD burners, the Teac DV-W58G-A and Memorex True-8x.

To check the reading performance of Aopen with pressed CD media, we used NeroCDSpeed and a data pressed disc.

All three tested drives support 40x maximum reading speed. The reading strategy
of the Aopen for the pressed disc, is CAV. The drive gave back the fastest
end and average speeds at 41.99x and 31.63x respectively.

The reported seek times for the Aopen are slightly higher than the acceptable
level. The above graph shows that Aopen was faster than the other two drives
on Full seek time. With the random and 1/3 seeks, the Aopen was faster than
Memorex but slower
than Teac.

To check the reading performance of Aopen with CDR media, we used NeroCDSpeed and a clone of the previous tested pressed media.

Just as with the pressed disc all drives managed to reach the supported
40x maximum reading speed. Aopen read the CD-R media under CAV reading strategy,
with a reported end speed of 41.63x

On the CD-R test disc, the Aopen drive gave back faster seek times than
the other two drives for 1/3 and Full seek modes, at 120ms and 177ms respectively.
On the Random
seek Teac gave back the fastest access time.

To check the reading performance of Aopen with US-RW media, we used NeroCDSpeed and a USRW disc from Mitsubishi Chemicals.

According to Aopen's specifications, the drive supports 32x reading speed
with RW media. After the end of NeroCDSpeed reading test, the software
reported
39.26x end reading speed for the tested device. As shown on the above graph,
the end speed of Aopen is higher than the other two drives. However the average
reading speed for all drives is at the same level.

3. CD Error Correction Tests

Aopen DRW8800/AAN-
Page 3

Error Correction Tests

In the following tests we check the drive's behavior when reading
scratched / defective audio discs. The test discs used were the ABEX series
from ALMEDIO.

- ABEX TCD-721R

Errors total

Num:
3072530

Errors (Loudness) dB(A)

Num:
132124

Avg:
-74.1 dB(A)

Max:-21.9 dB(A)

Error Muting Samples

Num:
9303

Avg:
1.1 Samples

Max:
89 Samples

Skips Samples

Num:
14

Avg:
6.4 Samples

Max:
12 Samples

Total Test Result

65.7 points (out of 100.0 maximum)

The software reported that the error correction abilities of the drive are
within the acceptable levels. The overall performance awarded was 65.7 points
out of 100. The 721R test disc is difficult to read with most drives, and
the Aopen writer logged 3072530 reading errors during the read process and
14 of them were skipped.

- ABEX TCD-726

Errors total

Num:
7787

Errors (Loudness) dB(A)

Num:
12100

Avg: -84.3
dB(A)

Max:
-15.2 dB(A)

Error Muting Samples

Num:
101

Avg: 12.1 Samples

Max:
467 Samples

Skips Samples

Num:
2

Avg:
6.0 Samples

Max:
6 Samples

Total Test Result

74.1
points (out of 100.0 maximum)

The 726 Abex test disc is less severe than the 721R and therefore the
score for the drive is better with a total score of 74.1 points.
The test finished with only 7787 errors but once again there was muting with
skipped
samples.

- CD-Check Audio Test Disc

The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction
/ Error correction capabilities of a CD player. The disc offers a signal combination
with disc error patterns to rate the drive's reading music abilities
and reproduce it completely. Five tracks on the disc contain a progressively
difficult sequence. These tracks are referred to as Check Level-1 through
Check Level-5.

The
tracks are reproduced (played) through a software multimedia player (i.e.
Winamp, PowerDVD, Windows Media Player). Each level is considered as passed, if the tone coming
out
from the speakers is smooth, continuous without interruptions, skipping or
looping. The higher the Check Level passed, the more reliable the sound reproduction
of the drive.

Error Level

1

2

3

4

5

Aopen 8x8 DVD Dual

5/5

5/5

5/5

0/5

0/5

Aopen 8x8 DVD Dual successfully passed only the first three levels of the
CD-Check Audio test. Most drives manage to pass up to 4th level but once again
Aopen proved poor on the CD error correction part.

- Summary

Test Disc

Reading Speed

Score

ABEX TCD-721R

Max

65.7

ABEX TCD-726

74.1

Average Score

69.9

The average score for the Aopen 8x8 Dual DVD is only 69.9 points
out of 100.0 This score, coupled with the poor overall performance of the drive
with the CD error correction tests shows a weak point of the AOpen writer.

4. DVD reading tests

Aopen DRW8800/AAN-
Page 4

DVD reading tests

To check the reading performance of the Aopen drive with single layer DVD-ROM,
we used NeroCDSpeed and the 820A test disc from Abex.

The single layer DVD reading test gave similar average reading speeds
for all writers. The 11.91x reported end speed for the Aopen drive is acceptable
although it was the slowest among the three. The disc was
read under CAV mode with an average
speed of 8.9x

The seek times of the Aopen drive are slighlty higher than the acceptable
level. The drive returned faster seek times than Memorex but proved to be
slower
than Teac in all modes.

The two layers of a PTP DVD-ROM disc are read sequentially, with the drive
starting the read process from the inner tracks on the disc, where lies the
beginning of each layer and progressing outwards towards to the outer tracks
for each layer. The tools for this test are Nero CDSpeed and the Abex 840
test disc.

Although previously NeroCDSpeed reported similar reading speeds for all devices
with the single layer DVD-ROM reading test, the dual layer disc reading results
are quite different. The Aopen drive returned results
slower than the other drives, with the Memorex and Teac drives having identical
speeds.

The seek times of the Aopen and Memorex drives are increased in comparison
to Teac. Aopen finished the Full seek after 236ms and that result is 67ms slower
than
Teac but 69ms faster than Memorex.

- Dual Layer OTP DVD-ROM

The
first layer of an OTP dual layer DVD-ROM is read exactly the same way as the
first layer of the PTP disc we tested previously. The difference here is the
reading strategy of the second layer on the disc. The beginning of the second
layer is located in the outer part of the disc, so the drive starts reading
from the outer tracks inwards towards the inner tracks of the disc.

The reading performance of the AOpen drive during the reading process of
the dual layer OTP disc was smooth and accurate. The drive read the disc under
CAV with
an end
speed of 7.20x and an average speed of 5.40x. The reported seek times however
are slightly high.

- DVD Ripping Tests

We measured the DVD-Video ripping speed for the Aopen 8x8 DVD Dual using the latest
version of DVD Decrypter. The DVD Video title is the "Matrix" pressed
DVD-Video.

The graph above shows that Aopen and Memorex drives finished the ripping
process with about the same average speed but the Teac drive provided double
the speed.

- DVD Recordable / Rewritable reading Tests

The chart below shows the Nero CDSpeed average reading speed results with
the following media by MC:

Just as with the other two tested drives, the Aopen drive returned similar
average reading speed independently of the tested DVD-R/RW or DVD+R/RW media.
The average
reading
speed of the Aopen drive however, with all tested media is slower in comparison
with the other two writers. The Aopen drive read all media under CAV reading
strategy.

5. DVD Error Correction Tests

Aopen DRW8800/AAN -
Page 5

DVD Error Correction
Tests

In the following
tests we examined the DVD reading capabilities of the Aopen drive
with scratched / defective DVD media. For the tests we used CDVD
Benchmark and Nero CDSpeed. The reference test media
come
from
ALMEDIO.

- Single Layer media

ABEX TDR-821

This is a single sided, single layer DVD-ROM with a 4.7GB capacity, and its
surface has an artificial scratch of dimensions varying from 0.4 to 3.0 mm.
The following transfer rate picture comes from the CDVD Benchmark v1.21 transfer
rate test.

The screenshot from CDVD Benchmark shows that Aopen finished the DVD error
correction test wihout reporting any reading errors. The yellow spots inidcate
that the drive had to change speed often, especially at the begining
of the
defective
area.
The succesfull completion of the test with a final reading speed of 14x, indicates
good and fast overall performance.

ABEX TDR-825

This is also a single sided, single layer DVD-ROM with 4.7GB capacity. The
data structure of the disc is exactly the same as that of the TDR-821, with
the difference that there are no scratches on the surface and instead
defective areas ranging in dimensions from 0.5 to 1.1 mm. There
are also fingerprints with height
between
65 and
75 micrometers.

Aopen proves so far to be a very good reader with defective DVD media The
test finished without reading errors and the reported end speed was 12x
CAV.

- Dual Layer media

ABEX TDR-841

This is an 8.5GB dual layer, single sided DVD-ROM disc with artificial scratches
of dimensions ranging from 0.4 to 3.0mm, on both layers.

Most drives have difficulties during the reading process
with the 841 Abex test disc but the reading performance of Aopen was unusual.
CDVD Benchmark reported read errors on both layers while from 1.3Gb to 2Gb
no
reading mesurements are reported.

ABEX TDR-845

This disc is a single sided, dual layer DVD-ROM disc with capacity of 8.5GB.
The only difference between the TDR-845 and the TDR-841 is that the first includes
both defective areas and fingerprints. The dimensions of the defective areas
range from 0.5 to 1.1 mm and the fingerprints have height sized from 65
to 75 microns (micrometres).

The reading performance of the Aopen drive with the 845 ABex
test disc on the error correction process is almost perfect. The Aopen 8x8
DVD Dual drive managed
to
bypass the defective areas on both layers without even needing to
slow down in speed. However the above screenshot shows that the drive changed
reading speed often during the switch operation for layer 0
to layer 1.

ABEX TDV-541

The
TDV-541 is a single sided, dual layer DVD-VIDEO disc, with a capacity of 8.5GB.The
disc is based on the TDV-540 series which is designed for inspection
and adjustment of DVD-VIDEO players. The disc checks the layer switch operation
from layer 0 to layer 1 and also includes test pictures and test signals for
DVD sound files. The current TDV-541 also checks the error correcting
capabilities of the drive and includes scratches sized from 0.4 to 3.0 mm.

ABEX TDV-545

The
TDV-545 disc is based on the TDV-540 series. It is a single sided, dual layer
Video/S-2 disc with a capacity of 8.5GB. The TDV-545 includes artificial black
dots on the disc's surface, sized from 0.4 to 1.0 mm. It also has 65 - 75 micrometre
high fingerprints.

The error corection performance of the Aopen drive with the 545
DVD-ROM disc was very good. The drive reached 4.59x reading speed while the
reported
average
speed was 3.44x. The disc was read smoothly under CAV without deviations to
the
reading velocity.

6. Protected Disc Tests

Aopen DRW8800/AAN-
Page 6

Protected Disc
Tests

- Reading Tests

To create an image of the various protected titles onto a hard disk, we used
Alcohol 120% v1.4.8.1222 and the appropriate settings, depending on the protection
type of the inserted discs. Below are summarized the capabilities of the Aopen
drive, according to CloneCD software. The summary below shows that the drive
supports writing of CD+G under RAW DAO:

The game titles we used to test the reading speed for each protection scheme
are given in the
table below:

Game Title

Protection Scheme

PSX "NBA Jam Extreme"

Lybcrypt

Serious Sam The Second Encounter v1.07

SafeDisc v.2.60.052

VRally II

SecuROM v.2

PSX Pressed Media

SafeDisc v.2

SecuROM v.2

Except form the PSX ripping, where the Aopen drive was the fastest, in the
other two cases it had average performance.

- Writing Tests

The Aopen drive supports the DAO-RAW writing mode.
For checking the drive's EFM correction status, we used 3 different game titles
with different SafeDisc versions and with the latest software patches installed.
After making the image files of the various titles to the hard disk, we burned
them (maximum speed) with Alcohol 120%. Two different discs were created for
each
title; one with the "Bypass EFM error" enabled and one more with
the
function disabled.

The table below shows the results of the attempted backups and whether
they working (game installed / played normally), or not.

Drive

Game Title

SD2 Build

Settings

Bypass EFM error On

Bypass EFM error Off

Aopen 8x8 DVD Dual

Max Payne

v2.51.020

Yes

No

Serious Sam - The Second Encounter
v1.07

v.2.60.052

No

No

The Sims Unleashed

v.2.8

No

No

The Sims Superstar

v2.9

No

No

Fifa 2004

v3.10

No

No

The Aopen drive made only one playable copy among all tested games. The drive
is definitely not a good solution for backing up protected games. The only
game that was
playable
was Max Payne that has the oldest Safedisc protection scheme of all tested
games. Moreover, the compatibility of the valid copy was restricted since the
Aopen was the only device on which the game could play.

7. DAE Tests

Aopen DRW8800/AAN-
Page 7

DAE Tests

- Pressed and CDR AudioCD results

To test the DAE reading performance of Aopen we used NeroCDSpeed and a pressed
audio disc. To check the performance on audio cdr media we made a clone of
the pressed disc.

CDSpeed
reported that the disc was read under CAV with average reading speed 25.67x.
The reported seek times were good.

We ripped the contents of both Pressed and CD-R Audio disc to our hard
disk, using the CDDAE software. Aopen gave the lowest average ripping speed
of the comparison with
both pressed and CDR media.

- Advanced DAE Quality

NeroCDSpeed Advanced DAE quality test awardede the Aopen drive
with aquality score of 100 (perfect). The returned the slowest reading
speed among
the
three drives while CDSpeed reported that the device is too slow for "On
The Fly" copying
at 16x but it can be safety be used as a reader, at slower speeds. On the advanced
features, the drive does not read Leadin/Leadout informations but reads Subchannel
Data and CD Text.

- Support of 90/99mins AudioCDs

The drive didn't manage to rip or play the contents of the 99min disc. However
the 90min disc played and ripped successfully.

- Reading/Ripping Protected AudioCDs

For the test procedure we used two audio discs with different
audio protection schemes. We tested for both recognition and
ripping to the hard disk. The software used was Exact Audio Copy.

The Aopen 8x8 was able to playback and rip the contents of both protected
audio discs.

8. CD Recording Tests

Aopen DRW8800/AAN- Page
8

CD Recording Tests

- CD-R Writing Tests

To test the writing speed and writing method of the drive we used a blank 80min CD-R disc from TY and NeroCDSpeed to emulate the writing process.

The
screenshot from NeroCDSpeed is representative of P-CAV writing. The
drive changed the writing speed 4 times in order to reach the maximum writing
speed of 32x. The writing process started at 15.99x and achieved writing at
32x after about 40min mark on the disc's surface. After that point the speed
was stabilized and the test finished at 32.08x, resulting in an average speed
of 27.32x.

- Recording Times

We created an 80min data compilation with Nero Burning Rom and recorded it on a 700MB disc.

The above graph shows that the Teac drive was the fastest writing device
and that was expected since it supports 40x maximum writing speed. Aopen was
second with maxumum avaliable writing speed 32x and Memorex was third with
maximum speed at 24x.

On the above graph we have summarized the writing speeds for
the Aopen drive at all avaliable recording speeds.

We used various media from different manufacturers to test the
writing speed and media compatibility of the Aopen. The results
are summarized on the
graph above. All tested discs returned almost the same time, showing a general
compatability with a wide variety of manufacturers media.

- CD-RW Writing Tests

To test the writing speed and writing method of the drive we used a blank 74min CD-RW disc from MC and NeroCDSpeed to emulate the writing process.

The
disc was writen with an end speed of 17.84x while the average reported speed
was 16.02x. The RW media was written uder CLV

Below we provide a comparison of the three drives where we used Nero Burning
Rom software to burn a 651MB data compilation onto 24x US-RW media from MC.

Aopen needed about 3:09 minutes for the writing test while the quick erase
finished after 30sec.

- Packet Writing Tests

For the packet writing test we used the InCD packet writing software from
Nero and a Mitsubishi Chemicals 24x US-RW media. The tested file is a 403 MB
file (412.822 KB) and we used the drag and drop method with Windows Explorer
to write the file from our hard disk onto RW media.

Operation

Duration

Average speed

Read

2:32 min

19.9 X

Write

3:30 min

14.4 X

The reading and the writing process under packet writing, gave back almost
the same results. The average reading speed is 19.9x while the average writing
speed is 14.4x.

- Other features

Overburning

Up to 90 min

CD text reading/writing

Yes

9. Writing quality - 3T Jitter Tests

Aopen
DRW8800/AAN-
Page 9

Writing Quality Tests - 3T Jitter Tests

Aopen 8x8 supports 32x maximum writing speed for CD-R media. To test the writing
quality of the Aopen, we used media from different manufacturers and burned
them at the maximum allowed speed. The Pit and Land
Jitter
of all
written media are illustrated in the graphs below.

- 3T Pit results

The jitter levels are low for all media except the AM brand, which means good
writing quality.

The above graph shows that the average Pit values of all written
media, except AM, is below the 35ns Red Book limit. All discs
were written at 32x under P-CAV and the values are very good.

- 3T Land results

As with the Pit jitter level, so too with Land jitter, the writng quality
is again good for all tetsted discs, except the AM. The graph below confirms
this.

Recording Speed

Average 3T Pit Jitter (ns)

Average 3T Land Jitter (ns)

> 35ns

Max 3T jitter values (ns)

TY 48X

30.68

29.93

No

33 Pit, 33 Land

SmartBuy 52X

28.49

28.76

No

31 Pit, 31 Land

Platinum 48X

30.68

31.00

No

34 Pit, 34 Land

AM 48X

36.46

34.95

Yes

39 Pit, 43 Land

Primedisc 48X

30.24

27.12

No

33 Pit, 32 Land

MAM 48X

30.68

29.95

No

33 Pit, 33 Land

The above table shows that all media produced quality writing. The maximum
3T jitter of all discs are lower than the 35ns Red Book limitation except
the AM disc. Aopen proves to be a quality writer with CD-R media.

10. C1 / C2 Error Measurements

Aopen DRW8800/AAN-
Page 11

Writing Quality Tests - C1 / C2 Error Measurements

The C1 / C2 error rate was measured for the recorded discs, burned during
the previous writing tests (jitter). The software used was UMDoctor Pro II
and the reader is the Optorite DD0203 drive.

Taiyo Yuden 48x recorded at 16x

Taiyo Yuden 48x recorded at 20x

Taiyo Yuden 48x recorded at 24x

Taiyo Yuden 48x recorded at 32x

Smartbuy 52x recorded at 32x

AM 48x recorded at 32x

Primedisc 48x recorded at 32x

Platinum 48x recorded at 32x

MAM 48x recorded at 32x

Below
is presented information for the CD-R media used in this test.

Disc

ID Code

Taiyo Yuden 48X

TaiyoYuden 97m24s01f

SmartBuy 52X

Prodisc 97m32s19f

AM 48x

Plasmon 97m27s18f

Primdisc 48x

Ritek 97m15s17f

Platinum 48x

Uknown 97m17s06f

MAM SG Ultra 48x

Mitsui Chemicals, Inc.97m27s58f

Umdoctor clearly showed quality results
for all written media. The TY discs, as expected, gave back the
lowest
C1C2 mesurements, among all tested media, at all writing speeds.
Slightly increased resutls reported from Smartbuy media while Primedisc
gave back increased C1 spikes from 40 to 50 min of the written
data.

11. DVD Recording Tests

Aopen DRW8800/AAN - Page 11

DVD Recording Tests

- Writing Performance

The Aopen DRW8800 supports both DVD-R/RW and DVD+R/RW writing. The drive
uses the same writing speed and strategy for the writable format at 8x under
Z-CLV.
For the rewritable discs the maximum writting speed of 4x is supported while
the writing strategy is CLV for both formats.

4x DVD-R

Nero
CDSpeed confirmed the 8x maximum writing speed. The disc was written under
P-CAV mode and as is shown in the screenshot below, the drive needed to inrease
speed twice. Aopen accelerated speed from 4x to 6x after 750mb, while the second
speed-up step was at 2.3Gb. The test ended at 8.67x
and despite the fact that the writting process started at 4.13x the reported
average speed was 6.80x, a result that is quite acceptable.

8x DVD+R

The
writing simulation of the +R media is similar to the previous tested -R disc,
with Z-CLV writing strategy and two speed steps at 750Mb and 2.3Gb respectively.
The end speed at 8.36x is slighlty increased in comparison with that reported
for -R media while NeroCDSpeed returned similar average writing speeds for
both writable media.

4x DVD+RW

4x DVD-RW

Just
like the +RW disc, the -RW disc was written under CLV strategy with average
recording speed 4.14x

- Burning Tests

The following graphs show the maximum writing speeds of the three devices
with all available DVD writable and rewritable media.

There is no major difference between the plus and the minus formats on writing
times for Aopen. The dirve needed a litlle more than nine minutes to complete
the
burning
task of writable media while the rewritable discs burning task finished after
about 14 minutes.

Kagaku 8x DVD+R

Verbatim 8x DVD-R

Maxell 4x DVD+RW

Kagaku 4x DVD-RW

Media

Code

Speed

Mitshubishi Kagaku 8x DVD+R

MCC003

8x

That's 8x DVD+R

YUDEN000 T02

8x

Philips 8x DVD+R

Philips C08

8x

CMC 8x DVD+R

CMC MAG E01

8x

That's 8x DVD-R

TYG02

8x

MCC 4x DVD-R

MCC01RG20

8x

Verbatim 8x DVD-R

MCC02RG20

8x

TY 4x DVD-R

TYG01

8x

CMC 8x DVD-R

CMC MAG AE1

4x

Maxell 4x DVD+RW

Philips 041

4x

Mitshubishi Kagaku 4x DVD-RW

MCC 01RW4x

4x

The table above presents writing speeds for the drive for various
media formats. Most of the tested media were succesfully burned at 8x writing
speed. On both formats, certified media for 4x writting were burned succesfully
at
8x by the Aopen writter. The drive used the same writing method and speed
for both writable formats and therefore the process ended after equal times,
about 9:20 minutes.
On the rewritbable media Aopen was about 10sec faster on the +RW disc while both, +RW and -RW formats were written under CLV mode.

- Packet Writing Tests

For this test we copied a 403 MB file (412.822 KB) from Hard Disk (on the
same PC as the recorder) in to formatted RW media, through Windows explorer
(drag and drop).

DVD-RW

Duration

Average speed

Read

1:58 min

2.5X

Write

2:30 min

2.2X

DVD+RW

Duration

Average speed

Read

1.32 min

3.3X

Write

1.23 min

3.7X

12. KProbe PI/PO quality tests

Aopen DRW8800/AAN - Page 12

KProbe PI/PO
quality results

The following screenshots show the PI/PO scans for various DVD-/+R
and DVD-/+RW media, recorded with Aopen dual 8x8 at the maximum permitted
speed.

The software used for the measurements was KProbe v1.1.28, the ECC was
set to 8 and the reader was LiteOn LDW-811s. The specific methodology is very
dependent on the
drive
used as a reader, while the reliability of the PI/PO provided output is also
not technically confirmed. Hence, we cannot safely come up
with conclusive results,
although we do make a comparison
of the drive behavior
when using
various
DVD recordable/rewritable
media.

The recordable discs we used, came from Verbatim, Taiyo Yuden, CMC, MAM,
Maxell , MC and Ritek. Further details about each disc type are presented at
the
bottom
of this page.

Kagaku DVD+R 8x (Recorded at 8x)

Thats 8x DVD+R (Recorded at 8x)

Philips 8x DVD+R (Recorded at 8x)

That's 8x DVD-R (Recorded at 8x)

MCC 4x DVD-R (Recorded at 8x)

Verbatim 8x DVD-R (Recorded at 8x)

TY 4x DVD-R (Recorded at 8x)

Maxell 4x DVD+RW (Recorded at 4x)

Kagaku 4x DVD-RW (Recorded at 4x)

Media

Code

Philips 8X DVD+R

Phlips C08

MITSUBISHI KAGAKU 8X DVD+R

MCC003

That's 8x DVD+R

YUDENT002

TY 4x DVD-R

TG01

MCC 4x DVD-R

MCC01RG20

That's 8x DVD-R

TYG02

Verbatim 8X DVD-R

MCC02RG20

MKM DVD+RW 4X

MKM A02

Mitsubishi Kagaku 4X DVD-RW

MCC 01RW4X

Kprobe awards the Aopen drive with quality results. From the screenshots above
we can see that all media used for the quality measurement, returned good
PI/PO levels. However the values are slightly increased at the end of each
disc but still acceptable for both DVD+R and DVD-R formats, even from media
that
are
certified for slower speed writing.